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Tailoring Kidney Transport of Organic Dyes with Low-Molecular-Weight PEGylation.
Bioconjugate Chemistry ( IF 4.031 ) Pub Date : 2019-11-23 , DOI: 10.1021/acs.bioconjchem.9b00707
Bujie Du,Xingya Jiang,Yingyu Huang,Siqing Li,Jason C Lin,Mengxiao Yu,Jie Zheng

Subtle changes in size can induce distinct responses of the body to hard nanomaterials; however, it is largely unknown whether just a few ethylene oxide unit differences in soft poly(ethylene glycol) (PEG) molecules could significantly alter the renal clearance of small molecules. By systematically investigating in vivo transport of the representative renal clearable organic dyes, IRDye800CW after being conjugated with a series of PEG molecules with molecular weight (MW) below 10 kDa, we found a MW-dependent scaling law: PEG45 (MW = 2100 Da) is an optimized MW to generate the most efficient renal clearance for IRDye800CW by expediting the glomerular filtration of organic dyes and reducing their nonspecific interactions with background tissue. Moreover, the uniqueness of PEG45 can be generalized to other organic dyes such as ZW800-1 and fluorescein. This finding highlights the importance of low-MW PEGylation in tailoring in vivo transport of organic fluorophores, which would broaden their biomedical applications.
更新日期:2019-11-28

 

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